I've noticed that the market has started opening with my alternate GMail account, the one I never use. It then only shows 4 apps instead of 105 or whatever. I have to go into accounts with the market open and choose my main account, then it shows everything as normal. There doesn't seem to be any way to pick a default account.

I found out that my market account switched itself to another gmail account I also use, so the account associated with my apps apparently was not selected and I couldn't see my installed stuff.

Another problem im dealing with now is why my facebook contacts wont appear on the phone. I've tried everything from the simple remove-add fb account to factory reset the phone as well as removing the DROID app from the list on my facebook account (from a pc browser) ... no luck.

This gingerbread release has got to be the biggest pile of trash I've seen yet.

I had the same problem, then did a bunch of random clear cach / reboot / force quit / uninstall updates. etc., etc., things in everyone combination and the apps eventually all showed up. I wasn't getting switched to my other accounts because I could still see my purchased apps.

Worked for about 2 days then all of sudden today gone again!!

So I removed all other gmail accounts just to see, cleared cache / uninstalled update / reboot and they are back again but who knows for how long!!!

There was a market fix out a while back, or rather a workaround I guess. It was force closing on me constantly. Googled and searched. Found a link where they went into settings/language and reset the language back to English, even though it was already english. I did this and my force closes went away. Try it with this maybe?